diff --git a/smack-extensions/src/main/java/org/jivesoftware/smackx/jingle/transport/jingle_ibb/JingleIBBTransport.java b/smack-extensions/src/main/java/org/jivesoftware/smackx/jingle/transport/jingle_ibb/JingleIBBTransport.java
index 8f92400e4..62032841b 100644
--- a/smack-extensions/src/main/java/org/jivesoftware/smackx/jingle/transport/jingle_ibb/JingleIBBTransport.java
+++ b/smack-extensions/src/main/java/org/jivesoftware/smackx/jingle/transport/jingle_ibb/JingleIBBTransport.java
@@ -47,6 +47,9 @@ public class JingleIBBTransport extends JingleTransport<JingleIBBTransportElemen
     public static final String NAMESPACE_V1 = "urn:xmpp:jingle:transports:ibb:1";
     public static final String NAMESPACE = NAMESPACE_V1;
 
+    public static final Short DEFAULT_BLOCK_SIZE = 4096;
+    public static final Short MAX_BLOCKSIZE = 8192;
+
     private final String streamId;
     private Short blockSize;
 
@@ -56,7 +59,7 @@ public class JingleIBBTransport extends JingleTransport<JingleIBBTransportElemen
     }
 
     public JingleIBBTransport() {
-        this(StringUtils.randomString(10), JingleIBBTransportElement.DEFAULT_BLOCK_SIZE);
+        this(StringUtils.randomString(10), DEFAULT_BLOCK_SIZE);
     }
 
     public Short getBlockSize() {
diff --git a/smack-extensions/src/main/java/org/jivesoftware/smackx/jingle/transport/jingle_ibb/JingleIBBTransportManager.java b/smack-extensions/src/main/java/org/jivesoftware/smackx/jingle/transport/jingle_ibb/JingleIBBTransportManager.java
index 8c9a80aab..b936044e3 100644
--- a/smack-extensions/src/main/java/org/jivesoftware/smackx/jingle/transport/jingle_ibb/JingleIBBTransportManager.java
+++ b/smack-extensions/src/main/java/org/jivesoftware/smackx/jingle/transport/jingle_ibb/JingleIBBTransportManager.java
@@ -33,8 +33,6 @@ import org.jivesoftware.smackx.jingle.transport.jingle_ibb.provider.JingleIBBTra
  */
 public final class JingleIBBTransportManager extends Manager implements JingleTransportManager {
 
-    public static final short MAX_BLOCKSIZE = 8192;
-
     private static final WeakHashMap<XMPPConnection, JingleIBBTransportManager> INSTANCES = new WeakHashMap<>();
 
     static {
@@ -73,7 +71,7 @@ public final class JingleIBBTransportManager extends Manager implements JingleTr
     @Override
     public JingleTransport<?> createTransportForResponder(JingleContent content, JingleTransport<?> peersTransport) {
         JingleIBBTransport other = (JingleIBBTransport) peersTransport;
-        return new JingleIBBTransport(other.getStreamId(), (short) Math.min(other.getBlockSize(), MAX_BLOCKSIZE));
+        return new JingleIBBTransport(other.getStreamId(), (short) Math.min(other.getBlockSize(), JingleIBBTransport.MAX_BLOCKSIZE));
     }
 
     @Override
diff --git a/smack-extensions/src/main/java/org/jivesoftware/smackx/jingle/transport/jingle_ibb/element/JingleIBBTransportElement.java b/smack-extensions/src/main/java/org/jivesoftware/smackx/jingle/transport/jingle_ibb/element/JingleIBBTransportElement.java
index a7156e5f8..d4c259f3d 100644
--- a/smack-extensions/src/main/java/org/jivesoftware/smackx/jingle/transport/jingle_ibb/element/JingleIBBTransportElement.java
+++ b/smack-extensions/src/main/java/org/jivesoftware/smackx/jingle/transport/jingle_ibb/element/JingleIBBTransportElement.java
@@ -27,15 +27,13 @@ public class JingleIBBTransportElement extends JingleContentTransportElement {
     public static final String ATTR_BLOCK_SIZE = "block-size";
     public static final String ATTR_SID = "sid";
 
-    public static final Short DEFAULT_BLOCK_SIZE = 4096;
-
     private final String sid;
     private final Short blockSize;
 
     public JingleIBBTransportElement(String streamId, Short blockSize) {
         super(null);
         this.sid = streamId;
-        this.blockSize = blockSize != null ? blockSize : DEFAULT_BLOCK_SIZE;
+        this.blockSize = blockSize != null ? blockSize : JingleIBBTransport.DEFAULT_BLOCK_SIZE;
     }
 
     public Short getBlockSize() {
diff --git a/smack-extensions/src/test/java/org/jivesoftware/smackx/jingle/JingleElementTest.java b/smack-extensions/src/test/java/org/jivesoftware/smackx/jingle/JingleElementTest.java
index eadb1f911..09a9a2d49 100644
--- a/smack-extensions/src/test/java/org/jivesoftware/smackx/jingle/JingleElementTest.java
+++ b/smack-extensions/src/test/java/org/jivesoftware/smackx/jingle/JingleElementTest.java
@@ -32,6 +32,7 @@ import org.jivesoftware.smackx.jingle.element.JingleContentElement;
 import org.jivesoftware.smackx.jingle.element.JingleElement;
 import org.jivesoftware.smackx.jingle.element.JingleReasonElement;
 import org.jivesoftware.smackx.jingle.provider.JingleProvider;
+import org.jivesoftware.smackx.jingle.transport.jingle_ibb.JingleIBBTransport;
 import org.jivesoftware.smackx.jingle.transport.jingle_ibb.element.JingleIBBTransportElement;
 
 import org.junit.Before;
@@ -290,7 +291,7 @@ public class JingleElementTest extends SmackTestSuite {
 
     @Test
     public void createTransportAcceptTest() throws IOException, SAXException {
-        JingleElement transportAccept = JingleElement.createTransportAccept(juliet, romeo, "transAcc", JingleContentElement.Creator.initiator, "cname", new JingleIBBTransportElement("transid", JingleIBBTransportElement.DEFAULT_BLOCK_SIZE));
+        JingleElement transportAccept = JingleElement.createTransportAccept(juliet, romeo, "transAcc", JingleContentElement.Creator.initiator, "cname", new JingleIBBTransportElement("transid", JingleIBBTransport.DEFAULT_BLOCK_SIZE));
         String jingleXML =
                 "<jingle xmlns='urn:xmpp:jingle:1' " +
                         "action='transport-accept' " +
@@ -298,7 +299,7 @@ public class JingleElementTest extends SmackTestSuite {
                         "sid='transAcc'>" +
                         "<content creator='initiator' name='cname'>" +
                         "<transport xmlns='urn:xmpp:jingle:transports:ibb:1' " +
-                        "block-size='" + JingleIBBTransportElement.DEFAULT_BLOCK_SIZE + "' " +
+                        "block-size='" + JingleIBBTransport.DEFAULT_BLOCK_SIZE + "' " +
                         "sid='transid'/>" +
                         "</content>" +
                         "</jingle>";
@@ -315,7 +316,7 @@ public class JingleElementTest extends SmackTestSuite {
 
     @Test
     public void createTransportReplaceTest() throws IOException, SAXException {
-        JingleElement transportReplace = JingleElement.createTransportReplace(juliet, romeo, "transAcc", JingleContentElement.Creator.initiator, "cname", new JingleIBBTransportElement("transid", JingleIBBTransportElement.DEFAULT_BLOCK_SIZE));
+        JingleElement transportReplace = JingleElement.createTransportReplace(juliet, romeo, "transAcc", JingleContentElement.Creator.initiator, "cname", new JingleIBBTransportElement("transid", JingleIBBTransport.DEFAULT_BLOCK_SIZE));
         String jingleXML =
                 "<jingle xmlns='urn:xmpp:jingle:1' " +
                         "action='transport-replace' " +
@@ -323,7 +324,7 @@ public class JingleElementTest extends SmackTestSuite {
                         "sid='transAcc'>" +
                         "<content creator='initiator' name='cname'>" +
                         "<transport xmlns='urn:xmpp:jingle:transports:ibb:1' " +
-                        "block-size='" + JingleIBBTransportElement.DEFAULT_BLOCK_SIZE + "' " +
+                        "block-size='" + JingleIBBTransport.DEFAULT_BLOCK_SIZE + "' " +
                         "sid='transid'/>" +
                         "</content>" +
                         "</jingle>";
diff --git a/smack-extensions/src/test/java/org/jivesoftware/smackx/jingle/transport/jingle_ibb/JingleIBBTransportTest.java b/smack-extensions/src/test/java/org/jivesoftware/smackx/jingle/transport/jingle_ibb/JingleIBBTransportTest.java
index 0264a393e..422d1e934 100644
--- a/smack-extensions/src/test/java/org/jivesoftware/smackx/jingle/transport/jingle_ibb/JingleIBBTransportTest.java
+++ b/smack-extensions/src/test/java/org/jivesoftware/smackx/jingle/transport/jingle_ibb/JingleIBBTransportTest.java
@@ -20,6 +20,7 @@ import static junit.framework.TestCase.assertEquals;
 import static junit.framework.TestCase.assertFalse;
 import static junit.framework.TestCase.assertTrue;
 
+import org.jivesoftware.smack.DummyConnection;
 import org.jivesoftware.smack.test.util.SmackTestSuite;
 import org.jivesoftware.smack.test.util.TestUtils;
 import org.jivesoftware.smack.util.StringUtils;
@@ -52,7 +53,7 @@ public class JingleIBBTransportTest extends SmackTestSuite {
         assertEquals(xml, parsed.toXML().toString());
 
         JingleIBBTransport transport1 = new JingleIBBTransport();
-        assertEquals(JingleIBBTransportElement.DEFAULT_BLOCK_SIZE, transport1.getBlockSize());
+        assertEquals(JingleIBBTransport.DEFAULT_BLOCK_SIZE, transport1.getBlockSize());
 
         assertFalse(transport.equals(null));
 
@@ -63,4 +64,23 @@ public class JingleIBBTransportTest extends SmackTestSuite {
         transport1.handleSessionAccept(transport2.getElement(), null);
         assertEquals(transport2.getBlockSize(), transport1.getBlockSize());
     }
+
+    @Test
+    public void jingleIBBTransportManagerTest() {
+        JingleIBBTransportManager manager = JingleIBBTransportManager.getInstanceFor(new DummyConnection());
+
+        JingleIBBTransport transport1 = (JingleIBBTransport) manager.createTransportForInitiator(null);
+        assertEquals(JingleIBBTransport.DEFAULT_BLOCK_SIZE, transport1.getBlockSize());
+
+        JingleIBBTransport transport2 = new JingleIBBTransport("sid", (short) 256);
+
+        JingleIBBTransport transport3 = (JingleIBBTransport) manager.createTransportForResponder(null, transport2);
+        assertEquals((Short) (short) 256, transport3.getBlockSize());
+
+        JingleIBBTransport transport4 = new JingleIBBTransport("sod", Short.MAX_VALUE);
+        assertEquals((Short) Short.MAX_VALUE, transport4.getBlockSize());
+
+        JingleIBBTransport transport5 = (JingleIBBTransport) manager.createTransportForResponder(null, transport4);
+        assertEquals(JingleIBBTransport.MAX_BLOCKSIZE, transport5.getBlockSize());
+    }
 }